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一个检验太阳光度计Langley定标结果可靠性的方法
作者:
作者单位:

1.陕西省气象科学研究所西安 710016;2.北京师范大学全球变化与地球系统科学研究院北京 100875;3.陕西省气象局秦岭和黄土高原生态环境气象重点实验室西安 710014;4.陕西省气象服务中心西安 710014

作者简介:

董自鹏,男,1984年出生,高工,从事气溶胶遥感与辐射效应研究。E-mail: dzp2003@126.com

通讯作者:

李星敏,E-mail: lixingmin803@163.com

基金项目:

国家自然科学基金项目 41905016 ; 41375155,秦岭和黄土高原生态环境气象重点实验室基金课题2019Z-7,陕西省重点研发计划项目 2019SF-269 国家自然科学基金项目41905016、41375155,秦岭和黄土高原生态环境气象重点实验室基金课题2019Z-7,陕西省重点研发计划项目2019SF-269


An Objective Method for Assessment of Langley Calibrations of Sunphotometer
Author:
Affiliation:

1.Meteorological Institute of Shaanxi Province, Xi'an 710016;2.College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875;3.Key Laboratory of Eco-Environment and Meteorology for the Qinling Mountains and Loess Plateau, Shaanxi Meteorological Bureau, Xi'an 710014;4.Shaanxi Meteorological Service Center, Xi'an 710014

Fund Project:

National Natural Science Foundation of China (Grants 41905016 ; 41375155), Key Laboratory of Eco-Environment and Meteorology for the Qinling Mountains and Loess Plateau Open Research Fund 2019Z-7 ; Key Research and Development Program of Shaanxi Province 2019SF-269 Funded by National Natural Science Foundation of China (Grants 41905016, 41375155), Key Laboratory of Eco-Environment and Meteorology for the Qinling Mountains and Loess Plateau Open Research Fund (Grant 2019Z-7), Key Research and Development Program of Shaanxi Province (Grant 2019SF-269)

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    摘要:

    准确反演气溶胶光学厚度(AOD)在气溶胶气候效应和环境效应研究中至关重要,仪器定标是目前AOD反演过程中最大的不确定性来源。Langley法作为应用最广泛的光度计定标方法,其对天气条件和大气洁净度要求苛刻,这在大气污染较重的地区难以实现,并可能导致AOD反演误差偏大。为了降低由不恰当的Langley定标所引起的AOD反演误差,本文提出一个利用辐射传输模式结合地面太阳直接辐射观测数据检验Langley定标结果合理性的方法,并利用西安2013年6月至2015年12月多滤波旋转遮光带辐射计(MFRSR)和直接辐射表(NIP)观测资料,探讨了方法的可行性。结果表明,该方法能够将Langley定标结果限定在较小的波动范围内,有效降低由定标不确定性引起的AOD反演误差,有助于提高单站点AOD观测精度。

    Abstract:

    Atmospheric aerosols play a critical role in many aspects of climate, environmental, and human health problems and have attracted increasing attention in recent years. It is of great importance to retrieve aerosol optical depths (AODs) accurately. Calibration of the direct solar radiation data obtained by sun photometers is a key step in obtaining accurate AODs. Unfortunately, there are significant errors in the AODs obtained for heavily polluted regions, such as most parts of China, by the use of incorrect solar calibration constants determined by the widely used Langley method. To overcome this problem, in this paper, we propose a method for performing an objective assessment of Langley calibrations that combines the surface shortwave radiation observed by a pyrheliometer with the SBDART atmospheric radiative transfer model. We verified the feasibility of the proposed method using two and a half years of solar radiation data obtained by the multi-filter rotating shadowband radiometer and the normal incidence pyrheliometer. The results showed that the accuracy of the AOD retrievals was improved and the solar calibration constants could be constrained to a set of stable values.

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董自鹏,余兴,卢娣,戴进,李星敏,陈闯,彭艳,董妍.一个检验太阳光度计Langley定标结果可靠性的方法.大气科学,2020,44(1):39~52 DONG Zipeng, YU Xing, LU Di, DAI Jin, LI Xingmin, CHEN Chuang, PENG Yan, DONG Yan. An Objective Method for Assessment of Langley Calibrations of Sunphotometer. Chinese Journal of Atmospheric Sciences (in Chinese),2020,44(1):39~52

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  • 收稿日期:2018-06-28
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  • 在线发布日期: 2020-01-22
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